施工偏差对钢弹簧浮置板结构尺寸及减振性能影响
张钰1,2王建西1,2,3郭庆1,2王晓曼1,2崔泽毅1,2
Influence of Construction Deviations on Structural Dimensions and Vibration Reduction Performance of Steel Spring Floating Slabs
ZHANG Yu1,2WANG Jianxi1,2,3GUO Qing1,2WANG Xiaoman1,2CUI Zeyi1,2
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作者信息:1.石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室，050043，石家庄
2.石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室，050043，石家庄
3.河北省铁路扣件系统技术创新中心，050043，石家庄
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Affiliation:1.State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Railway University, 050043, Shijiazhuang, China
2.Key Laboratory of Roads and Railway Engineering Safety Control of Ministry of Education, Shijiazhuang Railway University, 050043, Shijiazhuang, China
3.Hebei Railway Fastening System Technology Innovation Center, 050043, Shijiazhuang, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.12.036
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中图分类号/CLCN:U231.94
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栏目/Col:研究报告
摘要:
［目的］施工偏差会对施工项目造成不同程度的影响，因此有必要研究施工偏差对钢弹簧浮置板结构尺寸及减振性能的影响。［方法］针对具体现场施工时，地铁隧道内曲线段现浇钢弹簧浮置板产生的施工偏差问题，利用数学几何方法建立了多工序映射理论模型，考虑不同偏差组合工况，分析获得基底和浮置板厚度的偏差范围。在此范围内，基于ABAQUS软件建立动力学模型，分析施工偏差对减振性能的影响。［结果及结论］当隧道中心线偏移时，基底厚度的变化范围为75.72~281.75mm，浮置板厚度的变化范围为278.28~325.00mm。在基底厚度偏差范围内，钢轨振动响应峰值集中在低频段12.50Hz以内；当基底厚度为65mm时，其对减振性能的影响最大，减振性能降低了23.90%。在浮置板厚度偏差范围内，钢轨振动响应峰值集中在低频段3.15Hz以内。当浮置板厚度减小为45mm时，其对减振性能的影响最大，减振性能降低了24.24%。
Abstracts:
［Objective］ Construction deviation can affect project outcomes to varying degrees, making it necessary to study the impact of such deviations on the structural dimensions and vibration reduction performance of steel spring floating slabs. ［Method］ Focusing on the on-site construction deviation issues during the cast-in-place steel spring floating slab installation in curved sections of metro tunnels, a multi-process mapping theoretical model is established using mathematical geometry methods. By considering deviation combinations of different working conditions, the deviation ranges for the base and floating slab thicknesses are analyzed. Within these ranges, a dynamics model is built using ABAQUS software to evaluate the impact of construction deviations on vibration reduction performance. ［Result & Conclusion］ When the tunnel centerline deviates, the base thickness ranges from 75.72 to 281.75 mm, and the floating slab thickness ranges from 278.28 mm to 325.00 mm. Within the base thickness deviation, the peak of the rail vibration response is concentrated in the low-frequency range below 12.50 Hz. The greatest impact on vibration reduction performance occurs when the base thickness is 65 mm, reducing the vibration reduction performance by 23.90%. Within the floating slab thickness deviation range, the peak of rail vibration response is concentrated in the low-frequency range below 3.15 Hz. The greatest impact on vibration reduction performance occurs when the floating slab thickness decreases to 45 mm, reducing the vibration reduction performance by 24.24%.
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